P0105 OBD-II Trouble Code: Manifold Air Pressure (MAP) Barometric Pressure Sensor Electrical Circuit Problem

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0105 code

P0105 is a diagnostic trouble code (DTC) for "Manifold Air Pressure (MAP) Barometric Pressure Sensor Electrical Circuit Problem". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $0.0 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $0.0 $20.0
Toyota $0.0 $20.0
BMW $0.0 $20.0
SCHEDULE P0105 DIAGNOSTIC Get a fair and transparent estimate upfront

P0105 Trouble code definition

Manifold Air Pressure (MAP) Barometric Pressure Sensor Electrical Circuit Problem

What the P0105 code means

P0105 is the general code for a problem with the MAP circuit having an electrical failure or malfunction. The MAP sensor is an integral part of the fuel injection system and provides signals to the Engine Control Unit (ECU) for smooth operation and good fuel economy.

What causes the P0105 code?

The MAP circuit problem may have several causes:

  • The source of the problem is that the sensor range voltage output is out of the programmed input required by the ECU.

  • The most common problem is the vacuum hose on the sensor may be cracked, damaged, or kinked.

  • The wiring or MAP sensor may be bad, brittle, or have a bad connection. They could also be too close to higher voltage consumption components, especially alternators, ignition wires, etc. causing irregular signals.

  • The sensor itself may be stuck in one output voltage.

  • MAP sensors must operate within specific ranges to send correct signals for the ECU to coordinate with the throttle position sensor to adjust correctly for proper engine operation, power, and fuel economy.

  • If the engine is not in good condition, that it is missing, has poor fuel pressure, or there is an internal issue with the engine like a burned valve, it can prevent the MAP sensor from getting a correct output.

What are the symptoms of the P0105 code?

P0105 code will be usually preceded by the Check Engine Light coming on the dashboard display. The vehicle will most often not run well, idle poorly, accelerate erratically, run rich, and backfire because the MAP sensor and throttle position sensor are not operating together.

How does a mechanic diagnose the P0105 code?

Firstly, code P0105 will be cleared and rechecked to see if it comes back. The mechanic will do this by observing the live data on their scanner while driving. If the code or engine warning light comes back, then the mechanic will need to do a visual inspection to see if the vacuum line and other hoses on the intake system are missing, loose, damaged, or disconnected. If these things appear to be correct, the technician should do a voltage output test on the sensor while the engine is running to determine if the output voltages fluctuate with engine speed and load.

Common mistakes when diagnosing the P0105 code

Diagnostic errors are largely due to not following the correct procedure. First, follow the test procedure in the diagnosis to insure there is no intake air leak like a bad vacuum hose or other air connection. The technician must verify that the voltage output of the MAP sensor is in the correct range and fluctuates with the engine speed. Do not buy a new MAP Sensor unless it is clearly at fault.

How serious is the P0105 code?

The P0105 code will result in poor running of the engine and requires immediate attention. It is imperative to have a technician check it out as soon as possible. The MAP sensor issue can cause excessive fuel consumption, rough operation and difficulty starting in certain circumstances, and can cause other damage if continued to be driven. Occasionally, if no problems are found, the technician can reset the fault codes and , then retest.

Often times, if the engine warning light came on immediately at start up, and the OBD- II system can be reset and the vehicle will operate normally.

What repairs can fix the P0105 code?

The most common potential repairs to address the P0105 code are as follows:

  • Verify the code with a scanner. Reset the fault codes and perform a road test.

  • If the P0105 code comes back, then follow the test procedure.

  • Inspect the vacuum lines and electrical connector and wiring. Disconnect the electrical connector and then reinstall to insure a fresh electrical connection.

  • Check for vacuum leaks, loose hoses and clamps on the intake, especially on older cars.

  • If no problems are found, replace the MAP sensor.

Additional comments for consideration regarding the P0105 code.

Many vehicles with mileage over 100,000 have momentary sensor problems that usually occur during start up or prolonged stress situations on the drive train. If the engine warning light comes on and the vehicle seems to be operating normally, the OBD-II system can be reset using the scanner and the problem may not reoccur. This is why it is important to verify the fault and reset it before doing any repairs.

Need help with a P0105 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
P0105
trouble codes

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0105 code.

SCHEDULE P0105 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6604)

Rating Summary
6120
230
54
36
164
6120
230
54
36
164
 at YourMechanic

Raymond

37 years of experience
276 reviews
Raymond
37 years of experience
Mercedes-Benz CLK320 V6-3.2L - Check Engine Light is on Inspection - Las Vegas, Nevada
Very knowledgeable and know what to sense what’s wrong . I call Raymond a a hell of a mechanic!!!***
 at YourMechanic

Ronald

41 years of experience
148 reviews
Ronald
41 years of experience
Nissan Versa L4-1.8L - Check Engine Light is on - Conroe, Texas
He was a little late due to a flat tire but called to let me know. He did a great job explaining everything and throughly checking everything. And he solved the mystery of the knocking noise in my car!
 at YourMechanic

John

27 years of experience
10 reviews
John
27 years of experience
Subaru Outback H4-2.5L - Check Engine Light is on Inspection - Port Saint Lucie, Florida
John is not only very nice, but extremely knowledgeable. I feel very fortunate to have him to service my car. He is someone I would recommend to everyone I know. Outstanding!!
 at YourMechanic

Patrick

7 years of experience
55 reviews
Patrick
7 years of experience
Chevrolet Sonic L4-1.8L - Check Engine Light is on Inspection - Duluth, Georgia
Patrick was beyond anything I could've expected. This was my first time using your mechanic. Patrick was 15 minutes early, which was amazing. I was caught in a little bit of traffic, but he did not mind patiently waiting. When I got there, he was pleasant, knowledgeable, and listened to my concerns. Patrick did a full and thorough investigation on my car and its issues. He did not mind explaining what I did not understand multiple times and was very easy to talk to. Thank you again Patrick, keep up the great work!


More related articles

P2634 OBD-II Trouble Code: Fuel Pump B Control Circuit High
P2634 means that there is an issue with the fuel pump B control due to the circulation being high, defective fuel pump or fuel relay, or broken wire.
P0570 OBD-II Trouble Code: Cruise Control Accel Malfunction
P0570 code means that the PCM has identified a malfunction with your vehicle’s cruise control often due to defective cruise control or blown fuses.
P2507 OBD-II Trouble Code: System Too Rich (Bank 1)
P2507 P2507 code definition ECM/PCM Power Input Signal Low What the P2507 code means P2507 is an OBD-II generic code for the engine control module (ECM) detecting the power input to the ECM is below the required voltage for the...

Related questions

My car shows the Check Engine Light and DPF lights and coil light on the dashboard. What action should I take?

Hi. The EGR valve needs to be replaced and the passages to the EGR need to be cleaned. The EGR location is very tricky to get to so you may need a professional technician (such as one from YourMechanic) who...

The Check Engine Light comes back on after I reset it

When the Check Engine Light comes on without any specific warning, this can indicate a variety of possible issues. Unfortunately, without more specific symptoms, this can be tough to diagnose without the use of a scanning tool and the skill...

Why does the check engine light keep coming back on?

The check engine light comes on and stays on if the onboard computer sees a problem that could cause an increase in emissions or a problem with its systems. After looking at most of the possible codes or issues that...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com